GEANT4 Low Energy Working Group Meeting (CERN, 30-31/5/2002)

 

Present: MG, Petteri (partially by phone conference), Andreas, Alex, Francesco, Alfonso, Susanna, Susanne, Stéphane, Giovanni, Vladimir

 

Brief minutes of the meeting (compiled by Francesco), see also the presentations

 

  1. INTRODUCTION (MGP):

                  -    Goals and prospects for this meeting

-        Conferences: note the problem with LowEnergy electron raised at MCNEG (UK)

-        CERN Courier paper (June 2002)

-        G4 collaboration workshop (30/9 – 4/10) CERN

     

  1. STATUS (electron/photon)

-    AUGER effect (Alfonso):

      First implementation under testing

      Need cut to avoid large number of particles to be generated.

      New data included in the library (corresponding to G4LEDATA) 1.0 table.

-        POLARIZED PROCESSES (Francesco/Gerardo):

New method for changing reference frame

Check for orthogonality.

                        Physics validation in progress

                        Prospects for GammaConversion and Photoelectric effect

-        Problem in electron Bremsstrahlung

Simple test program (Giovanni/Francesco)

Parameterisation of Livermore data improvement (Vladimir)

Test and comparison with NIST data (Susanna)

 Tests with Karolinssnka data (Susanne)

-        These tests could should be committed to the cvs repository and would be useful for inclusion in a systematic physics validation           

 

  1. ANALYSIS and TEST project (MGP) open session with other interested collaborators

                  -    Joint project betweenfor G4 and Anaphe    

-      Scope of the project: unified framework for [electromagnetic] physics Unit Tests, Physics Validation and Regression Testing, statistical information in System Testing

and Regression Testing

-        Well defined software process

-        First step: use case modeling

-        People involved: - 1 Technical Student + 3 G4 LowEn part-time and  3 Anaphe part-time members

-        Other collaboration members welcome as contributors and b-testers

 

  1. DISCUSSION on USE CASES for ANALYSIS and TEST – open session with other interested collaborators

-        present: MGP, AP, Gabriele, John, Serguei, Lorenzo, Michel, Susanna,

      Francesco, Stephane, Alex

-     Various use cases discussed; Geant4 collaborators are invited to convey their contributions as use cases and non-functional requirements to Andreas and/or MG; to be documented in a use case model + supplementary specifications, that will be circulated among the stakeholders

-        Several use case discussed fall into some general requirements: compare histograms with histograms, histograms with vectors, histograms with fitted functions

-        Ntuple as useful storage in case of not known behaviour or not expected results

-        Configuration management issues were mentioned, but they are outside the scope of the project: for instance, CVS storage of previous results (and configuration) for regression testing

-        Confidence levels statistics to be defined for acceptance test in System Testing

-        Non functional requirements expressed: portability, licence free persistency, old format conversion

-        Project plan to be circulated shortlyNon functional requirements: portability, licence free format, old format conversion

-        It would be desirable for Geant4 to have rResults and reference data & papers documented in an appropriate web page

 

  1. G4 & MEDICAL PHYSICS: example of parallelisation (Stephane)

-        Radiotheraphy: need accurate dose calculation

-        PC cluster implementation. Note scalability of results

-        Joint project with Anaphe for parallelisation of Analysis and application of Kuba’s distributed computing model in a real use case?

 

  1. ANALYSIS TUTORIAL and AIDA 2.2 UPGRADE (Andreas)

-        Migration of Unit Tests (see lowenergy/test/G4ComptonTest as example)

-        Anaphe Python macros example – see also Anaphe web page

 

  1. ADVANCED EXAMPLES: Status and prospects for the release

-        Underground (Alex)

Update in the geometry

Problems with scintillation process

AIDA 2.2 upgrade

Documentation

-        GammaRayTel (Francesco)

Upgrade in Physics List

AIDA 2.2 upgrade

Documentation

FITS I/O persistency?

-        Brachytherapy (Susanna)

New sources

AIDA 2.2 upgrade

Documentation

-        Fluorescence (MGP)

AIDA 2.2 and Documentation upgrade

-        XrayTelescope (Petteri)

AIDA 2.2 upgrade (help from GammaRayTel people)

-        Schedules:

14 June deadline for documentation

14 June final candidate tag, to be tested with examples

 

  1. HADRONS/IONS STATUS (Vladimir)

-        Generic Ion problem solved

-        PIXE need for physics testing

-        Connection needed between RDM and Atomic Deexcitation

 

  1. PLANS for JUNE RELEASE

            -    Thorough test needed for changing the invocation of  the StopAndKill method (new implemention to address scintillation problem), prior to including it in a public release

-        Minor Changes in PolarizedCompton, first implementation of Auger

-        Fixes and improvements to electron processes

-        New version for Livermore Data

-        Unit Tests upgrade to AIDA 2.2 (all)

-        Need to commit to CVS of simple tests for electrons (Giovanni/Francesco, Susanna)

-        Documentation upgrade for processes and Examples

-        Review of Web documentation

 

  1. PROSPECTS for DECEMBER RELEASE

           -     Rose Tutorial and training (MGP): proposal of a simple exercise topic

-        OOAD prospects and priorities

1.     Final state

2.     Composable processes

3.     Energy Loss

4.     Atomic relaxation

1.     Analysis and testing (in parallel to physics OOAD)

2.     Examples (in parallel to physics OOAD)

-        Physics:

1.     Decoupling of Nuclear Stopping Power from Ionisation

2.     Doppler Broadening in Compton Scattering

3.     Angular Distribution for Bremsstrahlung

4.     Polarized Photoelectric and possibly GammaConversion

5.     Penelope models

-        Analysis

1.     Analysis and Testing project

2.     Other AIDA compliant toolkits example in unit tests

-        Examples

1.     Compton Telescope (Francesco/Gerardo)

2.     LISA CR effects (Alex)

3.     Underground environment (Alex)

4.     Parallelization example (Stephane)

5.     PET (Giovanni?)

6.     Karolinska (Susanne)

 

  1. PUBLICATIONS

1.     Antiproton: improvement in figures (Vladimir, Stephane, JoseMaria)

2.     Proton: submission after General paper (Vladimir)

3.     Polarized Compton: in progress (Gerardo, Francesco)

4.     Space examples: draft before summer vacations? (Francesco, Ramon)

5.     Medical examples: in progress

6.     Frameworks: first draft after G4 and Anaphe releases (Andreas, MG)

7.     Application of Frameworks: skeleton (Francesco)

 

 

  1. CONFERENCES

-        need common area for presentations

-        preparation for CHEP 2003

-        communication of dates and speakers on the web page

 

  1. AIDA workshop preparation

-        G4 and Analysis collaboration (MGP)

-        Medical Physics applications (Susanna)

-        Underground example (Alex)

-        GammaRayTel (Francesco/Riccardo/Giovanni)

 

  1. WORKING GROUP ORGANIZATION

-        Regular VRVS meeting (every two weeks)

First on 8 july

-        Wider distribution in the WG of the user support effort is required: “shifts” for user support? (Hypernews and Bug Fixing)

-        Name of the WG: different tasks (LowEnergy Physics, Analysis, Advanced Example). How to face the problem with respect to the collaboration (need for work recognition)? With respect to funding institutions (funds for clear responsibilities)? With respect to participants?

(how to share the work?). No clear way how to deal with this issue.